How Can I Access File Contents from a TAR Archive Without Extracting?

Accessing File Contents in a TAR Archive Without Decompression

You've successfully extracted file information from a TAR archive, but extracting file contents as strings requires additional steps.

Extract Using a TAR Reader

Treat the TAR reader (tr) as an io.Reader for each file you wish to access.

tr := tar.NewReader(r)
h, _ := tr.Next()

Obtain Entire File Content

If you require the entire file content as a string, utilize ioutil.ReadAll and cast the result to a string.

bs, _ := ioutil.ReadAll(tr)
s := string(bs)

Read File Line by Line

For line-by-line reading, consider using bufio.NewScanner:

s := bufio.NewScanner(tr)
for s.Scan() {
  l := s.Text()
  // Process the current line here
}

if s.Err() != nil {
  // Handle any errors
}

By following these steps, you can efficiently read file contents from a TAR archive without the need for decompression, enhancing your tar file handling capabilities.

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